📝 Step 5 — KMU Past Papers & Exam Learning
This section contains KMU-style past paper questions designed to strengthen conceptual understanding. Focus on understanding explanations rather than memorizing answers.
🎯 How to Study KMU Past Papers
- Read the question carefully.
- Think about the answer before looking.
- Read the explanation slowly.
- Understand the reasoning behind the correct answer.
- Revise difficult questions again.
MCQ 1
Question:
In an atherosclerotic abdominal aortic aneurysm, which sequence best explains progressive weakening of the vessel wall?
Options:
Endothelial swelling → venous congestion → capillary rupture
Immune complex deposition → glomerular necrosis → hematuria
Platelet adhesion → coronary occlusion → myocardial infarction
Intimal plaque → impaired medial nutrition → elastic tissue loss
Granuloma formation → sinus ulceration → lung cavitation
Correct Answer:
Intimal plaque → impaired medial nutrition → elastic tissue loss
MCQ 2
Question:
A patient develops a pulsatile swelling after a penetrating arterial injury. Imaging shows blood outside the vessel wall communicating with the lumen. Which lesion is most likely?
Options:
Fusiform aneurysm
False aneurysm
Saccular aneurysm
Aortic dissection
Mural thrombus
Correct Answer:
False aneurysm
MCQ 3
Question:
A resected abdominal aortic aneurysm shows severe intimal atheroma, thinning of media and laminated clot attached to the wall. The laminated clot represents:
Options:
Granulomatous arteritis
Fibrinoid necrosis
Cystic medial change
Intimal flap formation
Mural thrombus
Correct Answer:
Mural thrombus
MCQ 4
Question:
A patient with a large aortic aneurysm develops sudden pain and pallor of one lower limb. Which mechanism best explains this complication?
Options:
Embolization from thrombus within aneurysm
Granulomatous narrowing of carotid branches
Necrotizing glomerular inflammation
Immune destruction of pulmonary arteries
Compression of temporal artery lumen
Correct Answer:
Embolization from thrombus within aneurysm
MCQ 5
Question:
In syphilitic thoracic aortic aneurysm, medial weakening is mainly caused by:
Options:
ANCA-mediated neutrophil activation
Atheromatous occlusion of renal arteries
Obliterative endarteritis of vasa vasorum
Microabscess formation inside thrombus
Coronary thrombosis after childhood vasculitis
Correct Answer:
Obliterative endarteritis of vasa vasorum
MCQ 6
Question:
A young patient with Marfan syndrome develops aortic dissection. Which underlying wall abnormality is most relevant?
Options:
Fibrinoid necrosis of medium arteries
Necrotizing granulomas in respiratory tract
Atheromatous plaque in abdominal aorta
Cystic medial degeneration of aorta
Microabscesses within arterial thrombus
Correct Answer:
Cystic medial degeneration of aorta
MCQ 7
Question:
A CT angiogram shows a dissection involving the ascending aorta. Which classification and clinical implication best fit?
Options:
Stanford type B with conservative emergency priority
Stanford type A with surgical emergency priority
Large-vessel vasculitis with steroid-only priority
Medium-vessel arteritis with coronary surveillance
Small-vessel vasculitis with ANCA testing priority
Correct Answer:
Stanford type A with surgical emergency priority
MCQ 8
Question:
Aortic dissection extends into a major branch artery supplying abdominal viscera. Which clinical consequence is most expected?
Options:
Jaw claudication
Strawberry tongue
Scalp tenderness
Nasal ulceration
Mesenteric ischemia
Correct Answer:
Mesenteric ischemia
MCQ 9
Question:
Which finding most directly distinguishes aortic dissection from a simple aneurysmal dilatation?
Options:
False channel within the aortic media
Circumferential expansion of vessel lumen
Pulsatile abdominal swelling
Compression of adjacent structures
Mural thrombosis inside dilated segment
Correct Answer:
False channel within the aortic media
MCQ 10
Question:
Immune complex-mediated vasculitis produces vessel injury mainly through which mechanism?
Options:
Loss of elastic tissue due to aging
Direct compression by mural thrombus
Complement activation with leukocyte recruitment
Mechanical tearing of aortic intima
Tobacco-induced thrombosis of limb vessels
Correct Answer:
Complement activation with leukocyte recruitment
MCQ 11
Question:
In large-vessel granulomatous vasculitis, luminal narrowing most directly results from:
Options:
Mural thrombus detaching into distal vessels
Extravascular hematoma around arterial wall
Necrotizing glomerular crescent formation
Intimal thickening with inflammatory wall injury
Coronary aneurysm after mucosal inflammation
Correct Answer:
Intimal thickening with inflammatory wall injury
MCQ 12
Question:
An elderly patient with temporal headache develops sudden visual loss. Which pathological explanation is most appropriate?
Options:
Renal artery ischemia causing hypertension
Ophthalmic artery involvement causing ischemia
Coronary artery aneurysm causing thrombosis
Pulmonary artery inflammation causing hemoptysis
Digital artery thrombosis causing gangrene
Correct Answer:
Ophthalmic artery involvement causing ischemia
MCQ 13
Question:
A young woman with absent upper limb pulses is found to have hypertension due to renal artery narrowing. Which disease best explains both findings?
Options:
Giant cell arteritis
Polyarteritis nodosa
Kawasaki disease
Granulomatosis with polyangiitis
Takayasu arteritis
Correct Answer:
Takayasu arteritis
MCQ 14
Question:
A medium-sized muscular artery shows segmental transmural necrotizing inflammation. Different portions of the same artery show lesions at different stages of healing. Which diagnosis is most likely?
Options:
Polyarteritis nodosa
Giant cell arteritis
Takayasu arteritis
Kawasaki disease
Thromboangiitis obliterans
Correct Answer:
Polyarteritis nodosa
MCQ 15
Question:
A patient with polyarteritis nodosa develops abdominal pain after meals. Which vascular event best explains the symptom?
Options:
Temporal branch occlusion
Coronary mucosal arteritis
Mesenteric arterial ischemia
Pulmonary capillary hemorrhage
Digital venous thrombosis
Correct Answer:
Mesenteric arterial ischemia
MCQ 16
Question:
A child with mucocutaneous inflammation later develops myocardial ischemia. Which vascular pathology best explains this outcome?
Options:
Granulomatous inflammation of temporal artery
Thrombosing inflammation of tibial artery
Dissection through aortic media
Coronary artery aneurysm with thrombosis
Necrotizing glomerulonephritis
Correct Answer:
Coronary artery aneurysm with thrombosis
MCQ 17
Question:
Which combination of findings best supports granulomatosis with polyangiitis rather than polyarteritis nodosa?
Options:
Renal artery narrowing with abdominal pain
Necrotizing granulomas with glomerulonephritis
Coronary aneurysm with strawberry tongue
Absent pulses with aortic branch stenosis
Temporal headache with raised ESR
Correct Answer:
Necrotizing granulomas with glomerulonephritis
MCQ 18
Question:
A lung biopsy from a patient with chronic sinus disease and hematuria shows necrotizing granulomatous inflammation. Which serological marker is most supportive?
Options:
Anti-dsDNA antibody
Anti-centromere antibody
Anti-mitochondrial antibody
p-ANCA / MPO-ANCA
c-ANCA / PR3-ANCA
Correct Answer:
c-ANCA / PR3-ANCA
MCQ 19
Question:
A young smoker has recurrent superficial thrombophlebitis, rest pain and ischemic toe ulcers. Microscopy of an affected vessel is most likely to show:
Options:
Thrombus containing microabscesses
Granulomas disrupting elastic lamina
Fibrinoid necrosis of renal arteries
Atheromatous plaque with medial thinning
Necrotizing granulomas in lung tissue
Correct Answer:
Thrombus containing microabscesses
MCQ 20
Question:
Which feature best separates thromboangiitis obliterans from atherosclerotic peripheral vascular disease in an exam stem?
Options:
Older age with hypertension
Infrarenal aortic dilatation
Young smoker with distal digital ischemia
Coronary artery aneurysm in childhood
Temporal headache with jaw claudication
Correct Answer:
Young smoker with distal digital ischemia
📌 Important Exam Strategy
KMU examinations often test integrated understanding rather than isolated facts. Focus on linking anatomy, embryology, histology, and clinical concepts when reviewing questions.
✅ Revision Tip
If you can explain the reason behind the correct answer without looking at notes, your concept is strong.